Edirol R-4 User Manual

Main specifications

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Channels

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Signal Processing

AD/DA Conversion:

24 bits

Sampling Frequency:

44.1/48/96 kHz

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Data Type

Format:

WAV

Sampling Frequency:

44.1/48/96 kHz

Bit Depth:

16/24 bits

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Media

Internal Hard Disk Drive (40 GB)
CompactFlash (supports 32 MB–2 GB)

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Recording Time

16 bit/44.1 kHz (Stereo):

58 hours

16 bit/48 kHz (Stereo):

53 hours

24 bit/48 kHz (Stereo):

35 hours

16 bit/96 kHz (Stereo):

17 hours

* These recording times are approximate. Your actual results

may vary somewhat.

* If more than one recorded file exists, the total recordable time

will be less than these.

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Analog Inputs

Channel 1–4:

XLR type (phantom powered),
1/4 inch TRS phone type (balanced/unbalanced)

Internal Microphone (Stereo)

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Analog Outputs

LINE Out:

1/4 inch phone type (L, R),
RCA phono type (L, R)

Headphones:

Stereo 1/4 inch phone type

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Digital Input/Output

Coaxial type (conforms to IEC60958)

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Input Impedance

4 k ohms

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Nominal Input Level (Variable)

Line Level:

-33– +4 dBu

MIC Level:

-60– -23 dBu

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Output Impedance

LINE Out:

950 ohms

Headphones:

10 ohms

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Output Level:

LINE Out:

-10 dBV

Headphones:

40 mW + 40 mW

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Limiter threshold level

-10 dB (relative to digital full-scale),
maximum compression ratio 1:3

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Residual Noise Level

LINE Out:

-85 dBu

Digital Data:

-90 dBFS

(fs = 96 kHz, Input: 1 k ohms terminated,
Level Switch: MIC,
Input Level Knob: Min. Input: 4 channels simultaneously)

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Total Harmonic Distortion (THD + N)

0.03 %
(fs = 96 kHz, Input: 1 k ohms terminated, Level Switch:
LINE, Input Level Knob: Min. Input: 4 channels
simultaneously, Band Width: 22 kHz)

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Recommended Load Impedance for
Headphones

32 ohms

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Frequency Response

10 Hz–40 kHz (0– -3 dB)

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Phantom Power

48+/-2 V / 8 mA
Available 4 Channels simultaneously
(total of all channels must be 25 mA or less)

* 0 dBu = 0.775 Vrms

Recorder Part

Audio Input and Output Part

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